English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Majorana zero modes (MZMs) have been predicted to exist in the topologicalinsulator (TI)/superconductor (SC) heterostructure. Recent spin polarizedscanning tunneling microscope (STM) experiment$^{1}$ has observedspin-polarization dependence of the zero bias differential tunnelingconductance at the center of vortex core, which may be attributed to the spinselective Andreev reflection, a novel property of the MZMs theoreticallypredicted in 1-dimensional nanowire$^{2}$. Here we consider a helical electronsystem described by a Rashba spin orbit coupling Hamiltonian on a sphericalsurface with a s-wave superconducting pairing due to proximity effect. Weexamine in-gap excitations of a pair of vortices with one at the north pole andthe other at the south pole. While the MZM is not a spin eigenstate, the spinwavefunction of the MZM at the center of the vortex core, r = 0, is parallel tothe magnetic field, and the local Andreev reflection of the MZM is spinselective, namely occurs only when the STM tip has the spin polarizationparallel to the magnetic field, similar to the case in 1-dimensional nanowire2.The total local differential tunneling conductance consists of the normal termproportional to the local density of states and an additional term arising fromthe Andreev reflection. We also discuss the finite size effect, for which theMZM at the north pole is hybridized with the MZM at the south pole. We applyour theory to examine the recently reported spin-polarized STM experiments andshow good agreement with the experiments.

physical review. b./physical review. b

Theory for Spin Selective Andreev Reflection in Vortex Core of  Topological Superconductor: Majorana Zero Modes on Spherical Surface and  Application to Spin Polarized Scanning Tunneling Microscope Probe